2.Definition: a framing member crossing and supporting the ends of joists, studs, or rafters so as to transfer their weight to parallel joists, studs, or rafters
3.Definition: a headlong jump (or fall)
"He took a header into the shrubbery"
5.Definition: a machine that cuts the heads off grain and moves them into a wagon
6.Definition: brick that is laid sideways at the top of a wall